Having owned a 2020 Harley-Davidson Street Glide for a few seasons, I finally decided it was time to upgrade the exhaust. I went with the ZARD Slip-Ons "4.5 Inches" Exhaust, and it has absolutely transformed my riding experience.

When the package showed up, I could immediately sense the quality. These spin-on silencers are handcrafted in Italy from AISI 304 stainless steel, with CNC-machined anodized aluminum end caps that really elevate the look I opted for the Black Chrome finish—the contrast against my Dark Blue bike is stunning.

Installation was a breeze—a true bolt-on setup. No ECU remapping required, no guesswork—just swap, tighten, and roll
Now, the sound. Oh man. At idle, the bike now purrrs with a deep, commanding rumble. Twist the throttle and it wakes up with a rich, full-bodied growl that pulls attention without being overbearing. It’s aggressive, but still refined—you can actually enjoy it without all the drone.

Performance gains were real, too. I went with the Racing version, and immediately noticed sharper throttle response and smoother acceleration. ZARD advertises a +2.3 HP gain for the Racing model, and that extra shove is absolutely noticeable when overtaking hills or moving through traffic
Over long rides, I’ve felt like my Street Glide regained some of that initial excitement, with improved aerodynamics and a slimmer feel (since the slip-ons are lighter—around 9.5 kg for Racing, versus 9.8 kg for the homologated version)

When I decided to swap out the dull, stock exhaust on my 2019 Street Glide, I didn’t expect such a dramatic upgrade—but that’s exactly what the ZARD 4.5" Slip-Ons delivered. Right out of the box, the craftsmanship caught my eye: the stainless steel body feels impeccably solid, and the Black Chrome finish gives my bike a sleek, almost stealth-like edge that stands out even among all that chrome on the road
Installation was refreshingly straightforward. Everything aligned perfectly and bolted on in under an hour—no ECU tuning, no wrestling—just bolt-on and ride Even before firing up the engine, I could tell this was a premium piece.

And the sound... Chef’s kiss. At idle, the bike hums with a deep, resonant rumble that demands respect. Twist the throttle, and it unleashes a full-bodied growl—intense, yet refined—that turns heads without drowning out conversations. It’s aggressive without being obnoxious, exactly the balanced tone I was after
Performance-wise, the difference was palpable. The bike’s throttle response sharpened noticeably, and acceleration felt more eager and energetic. Opting for the Racing version gave me a small but satisfying boost—about +2.3 hp—so I feel that extra surge especially when cruising uphill or passing slower traffic
All in all, the ZARD 4.5" Slip-Ons are more than just a visual upgrade—they’re a sonic and performance transformation that complements the Street Glide's touring soul. If you want your bike to look the part, sound powerful, and ride smoother, this is a no-brainer. I’m thrilled with mine.

I just installed the ZARD Slip-Ons “4.5 Inches” exhaust on my 2018 Harley-Davidson Street Glide, and from the first ride, it felt like the bike had been reborn.

Craftsmanship & Build Quality: These beauties are meticulously crafted in Italy, constructed with high-grade stainless steel, and capped with anodized aluminum end pieces. Pick your flavor—Black, Chrome, or Black Chrome—but whichever you choose, expect a premium finish that elevates both look and feel.
Sound & Character: The idle tone is a deep, assertive rumble that demands attention without being overwhelming. Crack the throttle and the growl evolves into a smooth yet aggressive roar that complements the Street Glide’s touring soul perfectly.
Performance Gains: I opted for the Racing version, and the ride feels noticeably livelier. ZARD advertises around +2.3 hp, and you can feel that punch right off the line—throttle response sharpens, and the bike feels more responsive in every gear.If street-legal cruising is more your path, the E4/E5 homologated version trades a bit of power (+1.2 hp) for compliance, but still delivers a discernible uptick.
Installation Ease: Zero hassle—true bolt-on simplicity. No ECU tweaks, no extra tools required. My Street Glide looked, sounded, and performed better in under an hour.

I just wrapped up installing the ZARD Slip-Ons “4.5 Inches” Exhaust on my 2019 Harley-Davidson Street Glide, and wow — the difference is night and day.

First off, the build quality speaks volumes. These slip-ons are handcrafted in Italy from premium AISI 304 stainless steel, lending them an unmistakable feeling of durability and craftsmanship. Choose between Black, Chrome, or Black Chrome, each accentuated by sleek anodized aluminum end caps and a subtle ZARD nameplate that elevates the aesthetic to a whole new level
But it's the sound that truly stops you in your tracks. At idle, you get a commanding yet refined rumble that gives the Street Glide a serious presence. Twist the throttle, and the growl deepens into a smooth, powerful roar that's aggressive without ever feeling excessive
Performance also gets a tasteful boost. I opted for the racing version, and can definitely feel the +2.3 hp gain — the bike breathes more freely, throttle response is sharper, and acceleration is noticeably livelier If you're after a street-legal option, the E5 homologated version still delivers a respectable +1.2 hp upgrade
nstallation was refreshingly easy — truly a bolt-on experience. Everything aligned flawlessly and bolted in under an hour, with no need for ECU remapping

I recently swapped the stock mufflers on my 2020 Harley-Davidson Street Glide for the ZARD Slip-Ons “4.5 Inches” exhaust, and the transformation is nothing short of spectacular.

First impressions? Top-tier craftsmanship. These slip-ons are handcrafted in Italy using AISI 304 stainless steel, and the finish—whether Black Chrome, gleaming Chrome, or stealthy Black Cerakote®—is flawless. The anodized aluminum end caps and the clean Zard nameplate give the rear end of my bike a custom, premium upgrade that’s subtle yet unmistakably high-end
Sound and presence? Next-level. At idle, the bike emits a deep, commanding rumble that grabs attention without crossing into obnoxious territory. Roll the throttle, and the growl deepens into a smooth, powerful roar that perfectly suits the Street Glide’s touring spirit
Under the hood? Noticeable gains. I opted for the racing version, and the +2.3 hp increase is definitely felt in real-world riding—crisper throttle response, stronger acceleration, and noticeably livelier power delivery. If you need it street-legal, the E5 homologated version still provides a respectable +1.2 hp
Installation was effortless. True bolt-on with perfect fitment—no ECU tuning required, no tweaks needed. I had them installed in under an hour and rode off with that aggressive new soundtrack instantly Final Verdict: The ZARD Slip-Ons turn your Street Glide into a statement on wheels. Italian craftsmanship, standout aesthetics, an exhilarating sound profile, and a tangible boost in performance—all without fuss. For anyone looking to elevate both the character and feel of their bike, this is a clear five-star upgrade.